package com.example.util;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebFilter("/*")
public class Filter implements javax.servlet.Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
//        servletResponse.setCharacterEncoding("UTF-8");
        servletResponse.setContentType("text/html;charset=utf-8");
        servletRequest.setCharacterEncoding("UTF-8");
        servletResponse.setContentType ( "text/html; charset=utf-8" );
        //设置响应头允许ajax跨域访问
        HttpServletResponse response = ( HttpServletResponse ) servletResponse;
        response.setHeader ( "Access-Control-Allow-Origin", "*" );
        response.setHeader ( "Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE" );
        response.setHeader ( "Access-Control-Max-Age", "3600" );
        response.setHeader ( "Access-Control-Allow-Headers", "token, Accept, Origin, X-Requested-With, Content-Type, Last-Modified" );
        filterChain.doFilter(servletRequest,servletResponse);
    }

    @Override
    public void destroy() {

    }


}
